Unidirectional freezing freeze-thaw cycle triaxial apparatus and test method thereof

A technology of freeze-thaw cycle and triaxial instrument, which is applied in the direction of applying stable tension/pressure to test the strength of materials, can solve the problem that the simulation of the one-way freezing process of foundation soil cannot be realized, the research on the strength characteristics of freeze-thaw conditions cannot be realized, and the device cannot Mechanical strength and other issues, to achieve the effect of simple structure, small size and convenient operation

Inactive Publication Date: 2013-07-10
CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
View PDF11 Cites 30 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In 2004, Chang Xiaoxiao and others proposed a low-temperature and high-pressure triaxial creep tester (see Chinese Patent No. "ZL200420085815.6" for details), which uses a three-way freezing method to achieve triaxial creep tests and strength tests at low temperatures. , but the one-way freezing process simulation of the foundation soil under the condition of atmospheric cooling cannot be realized
In 2010, Fu Wei et al. proposed a multifunctional highway soil foundation freeze-thaw cycle test device (Chinese patent number is "ZL201020254199.8"), which can realize unidirectional freezing and freeze-thaw

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Unidirectional freezing freeze-thaw cycle triaxial apparatus and test method thereof
  • Unidirectional freezing freeze-thaw cycle triaxial apparatus and test method thereof
  • Unidirectional freezing freeze-thaw cycle triaxial apparatus and test method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] The technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention.

[0026] The present invention is refitted on the basis of conventional triaxial instrument, as figure 1 As shown, the unidirectional freeze-thaw cycle triaxial instrument of the present invention includes a pressure chamber A, a host machine B, a stable air pressure source C, a temperature control system D, a water supply device E, and a testing and data acquisition system F.

[0027] Please refer further figure 2 , the pressure chamber A includes an outer pressure chamber 5 and an inner pressure chamber 6 arranged in the outer pressure chamber 5 , during the one-way freezing test, the sample is placed in the inner pressure chamber 6 . The outer wall of the outer pressure chamber 5 is provided with heat insulating material 4 . The top of the internal pressure chamber 6 is provided with a sample cap co...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a unidirectional freezing freeze-thaw cycle triaxial apparatus which comprises a pressure chamber, a mainframe, a stable air pressure source, a temperature control system, a water replenishing device and a test and data acquisition system, wherein the pressure chamber comprises an external pressure chamber and an internal pressure chamber; the upper part of the internal pressure chamber is provided with a sample cap formed by an upper box of the sample cap and a lower box of the sample cap; the bottom of the pressure chamber is provided with a base formed by an upper box of the base and a lower box of the base; the sample cap, the base and the external pressure chamber are respectively connected with a refrigerating machine by a heat insulation pipeline; the upper part of the pressure chamber is provided with a load power transmission shaft which passes through an upper cover of the pressure chamber and acts on the upper box of the sample cap; the base of the pressure chamber is connected with the water replenishing device by a pipeline; the mainframe is used for providing power for cutting a sample; and a temperature sensor arranged on the refrigerating machine and a displacement sensor and a load sensor which are arranged on the mainframe are connected with the test and data acquisition system. The unidirectional freezing freeze-thaw cycle triaxial apparatus can realize the unidirectional freezing freeze-thaw cycle test under the conditions of low temperature and water supplement, and meanwhile can be used for testing the triaxial strength under the freeze-thaw cycle condition.

Description

technical field [0001] The invention relates to the technical field of rock and soil mechanics and engineering testing, in particular to a unidirectional freezing-thawing cycle triaxial instrument and a testing method. The invention can realize the one-way freezing test and the freeze-thaw cycle test under the condition of low-temperature replenishment, and simultaneously test the triaxial strength under the condition of freeze-thaw cycle. Background technique [0002] The distribution area of ​​seasonal frozen soil in my country is very extensive, covering areas with latitude higher than 24°, and its distribution area is 5.137×106km 2 , accounting for 53.5% of the country's land area. The foundation soil of industrial and civil buildings, canals, culverts, roads and bridges in the seasonally frozen soil area changes with the alternation of winter and summer, and the soil freezes and thaws. This phenomenon is called a freeze-thaw cycle. During the freezing process, the phy...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01N3/18
Inventor 胡波龚壁卫来光苏克敬井书光邵勇姚雄刘军童军周跃峰
Owner CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products